I'm not sure if any sell-side analysts would join this service. The sell side and the buy side have their own ecosystem, and they are highly unlikely to share information such as target prices with third parties. The sell-side analyst writes a research report, the firm he/she works for spams it out to buy-side clients and then the analyst gets on the phone and starts calling those clients to talk about the report. If the sell-side analyst is lucky, the buy-side client will then put a large trade through with the trading desk at the sell-side analyst's firm. If this happens frequently, the analyst is handsomely rewarded at bonus time.

Echoing phyalow's comments, most sell-side research is indeed garbage. Target prices are often today's price plus 15-25%. Then the analyst massages his/her EPS or EBITDA estimate and P/E or EV/EBITDA multiple so that the target price is plausible. Most larger companies provide earnings guidance, so the analyst will stay within the guidance range and apply a plausible multiple to arrive at the pre-determined target price. The analysts are all afraid of going out on a limb and making a bold call, so before publishing research they run over to the Bloomberg terminal to check the target prices and estimates of other analysts covering the stock, and then adjust their targets/estimates accordingly.

The real value of sell-side research to a buy-side client is being able to get on the phone and talk to someone who is very knowledgeable about a stock. If a buy-side client is getting up to speed on a company, it is very valuable to call up a sell-side analyst and get a full rundown of all the issues about a stock.

Also, although almost all sell-side analysts are bulls, some are more bullish than others. So one of the keys to getting value out of sell-side research is reading at least five years of an analyst's coverage of a company and learning to read between the lines. You may realize that Brooke the Bull is always optimistic and promotional, but after this most recent earnings report, you may sense that she is slightly less bullish than usual, even if her target price is still double the latest closing price. This would be your intel that it wasn't a great quarter.