I don't mean to be rude, but you've bought some bad wood there. You can see knots in the sapele towards the end of the first piece of wood you've bought - that'll stop you getting the full two outside pieces for the neck first off.
As for the second set of walnut bits, there's a reason they're on ebay at that price - and I know the seller you got them from, gibson craftwood. They're not an instrument wood seller, they aren't picking wood for guitar building. And those walnut pieces have horrendous knots in them, I don't want to think what that means in terms of grain direction or run-out, but I'd dismiss those out of hand.
Buying wood from ebay for the first time builder is not something I'd recommend. Go to a reputable dealer, like David Dyke, Touchstone or even Craft Supplies. You might get lucky with those bits of wood, or you might get far into your project just to realise the wood's warped and undone all your hard work. It'll cost you more to buy from the dealers, but that's because you get what you pay for.