I don't think I'd ever sell my models, at least my painted ones. First of all, the market for those is probably crashing. Secondly, meager though my painting skills may be, I'm too proud of what I've done to trade it away.
But, I may stop playing competitive events, which is sorta a big thing for me. And I'm kinda boycotting GW products. Like, I actually love this knight model, I think it's very pretty, but I'm disgusted enough by the rules, what I think it will do to 40k, that it would really bother me to buy one. And I know GW doesn't deserve my money for their rules anymore.
My last 3 tournament winnings have gone to warmachine. And I spent $60 for the whole card library for my phone app! Which sounds crazy to me, but I don't even regret it. Those cards are promised to update. I have the rules for all Warmahordes products, forever, for a little more than GW thinks I owe it for a codex with maybe 12 units, and 40 pages of recycled fluff and pics.