Originally posted by kerrowdown I'd have to keep the Pentax A 50/f1.4, as IMHO is good all rounder every day use lens.
If he had a film camera I would totally agree with you, but with APSC I find I never use mine except on my film bodies unless I need the speed and don't mind the tiny view. Its just too narrow a FOV for most anything I want to take a picture of. Same situation with the nifty macro prime. The A35 F2.8 would be a better one lens answer if he wanted a prime (basically the APSC 50mm).
EDIT: (I like to edit it seems) I still say the primes will get you the best resale price and be easy to sell (all 3 are desirable) The 35-105 zoom is critical to keep and the 70-210 is worth more for you than you could get selling it. The 35-70 F4 I would recommend selling anyways as it is good but is totally covered by the better 35-105 F3.5.