I didn't want to open this debate again, but I wonder if I can add a few dimensions to other comments, bear in mind my comments are referring to OO gauge:
I'm not too sure that 'discounts' are representative of a product being unsuccessful, there are quite a few 108 models at Hattons discounted for instance and Vitrains models were heavily reduced when in routine production. But also, since Hattons presumably purchased the 85s from Bachmann at X-price, Bachmann themselves wouldn't be at a loss unless they have a load in warehouses (note following point about limiting numbers), and I find it unlikely that Hattons would sell them at a loss (unless stock clearing).
I think the AC market would be more successful if there were lower production numbers of each type - I know Bachmann 85101 is still available in a few locations, but these are all at top whack - no discounting here. I can see a different approach being necessary, and perhaps the limited edition could be the way to do it a la Realtrack with the 144s being produced once, and once only in each specific livery type. Granted it's not going to be a quick profit leading product, but I do find it strange that Hattons can justify dozens of Cobos for a very limited market (many of which are now discounted).
Either way, I'm sure DJMDave managed to look at the finances for the Dapol 86 before leaving and can decide from that if it is worthwhile from experience.