Bear in mind that the Apaches don't necessarily add value for a potential buyer - they might want to keep it stock or use EMGs or something. And if it ever becomes a "vintage" instrument it'll be worth more if it's as original as possible.
If you still have the original parts, I'd put them back on and sell the pickups and upgraded parts separately, you'll get more money that way.
If I was eBaying it I'd probably have a reserve of £450-£500 and hope to get a bit more, but I haven't bought a new Strat for a few years, I've lost track of the prices TBH.