I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. See all posts by Christopher Ruane I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. “This Stock Could Be Like Buying Amazon in 1997” Image source: Getty Images. Investors love little-known growth stories with proven successful strategies. Judges Scientific (LSE: JDG) applies a disciplined set of criteria in scooping up scientific instrument makers. That is a profitable niche. The Judges Scientific share price has soared in the past few years.Recently the founder sold over three million pounds of his holding in Judges. What might this mean for the stock?5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…The Judges Scientific share price was already highI think Judges is an excellent run business. It has identified an area with customers who have steady demand for expensive products. In scientific research, exactitude matters a lot – so customers are willing to pay a premium price for a high quality product. Through its discipline in buying companies at a low multiple of earnings, Judges has been able to build a diverse set of value producing assets which is hard to replicate. It matches a lot of what Warren Buffett suggests makes a good business.The stock market had noticed this, pushing the share price upwards.For example, the shares almost quadrupled between the start of 2017 and 2020. Over 2020 they moved around a lot. Shutdowns meant university labs and research institutes weren’t in such a rush to buy instruments. Those that were sold couldn’t always be installed quickly. Nonetheless, the robustness of the business model proved itself again and the shares added another £10 or so across the year. The organic order book at the start of 2021 was higher than a year before.Last month the company guided that its adjusted earnings per share for the year would exceed market expectations. The Judges Scientific share price hit a new high. On 19th January, its founder David Cicurel sold 50,000 shares. That sounds like a lot and indeed it was a multi-million pound transaction. However, it was only 7% of his holding. After the sale, Mr. Cicurel still holds over 650,000 shares in the company he set up.Valuation concernsDirectors sell shares for all sorts of different reasons. A sale in itself is not necessarily cause to concern.I continue to find the business model compelling. The company has increased ordinary dividends each year by a double digit amount for over a decade now. I also expect that the pandemic will increase long-term demand for scientific instruments, so think that Judges Scientific’s growth story could actually still be in its opening innings.However, the strong price rise in recent years has given me pause for thought. At a price-to-earnings ratio of 27, the shares are not cheap. While I like the dividend policy, the dividend yield sits below 1% due to the high share price.But the well-constructed cash generative business model, quality assets and growing demand means that the share price has continued its ascent. It seems to have shrugged off the director’s sale and I don’t think the market is interpreting as a lack of confidence in the future Judges Scientific share price.I will be spending time to examine the company and its market opportunity more closely to consider buying the shares. Judges Scientific probably has a magnifier that would be ideal for the task! Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Simply click below to discover how you can take advantage of this. Our 6 ‘Best Buys Now’ Shares What might this director sale mean for the Judges Scientific share price? Christopher Ruane | Saturday, 27th February, 2021 | More on: JDG Enter Your Email Address Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. christopherruane has no position in any of the shares mentioned. The Motley Fool UK has recommended Judges Scientific. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.