erm hello

found my amiga stuff(and c64) in the loft and im going to flog it on ebay, i dont use it and i'd rather it go to a good home than sitting in the loft.
so what am i going to get rid of (all working)
a500+512KB upgrade complete boxed
a590+2MB 20MB hard disk drive includes the red metal thingy
external dual 3.5 disk drive unit.
a datel disk copier
original games including the great giana sisters (ive actually got 2 orignals of this)
a few magazines/ issue one of Amiga shopper.
a few programming books
i havent a clue if any of this is worth anything, would i be best selling as a complete lot or splitting?
hope i dont upset anyone with this first post, selling my stuff.
mongoose.
edit:512MB to 512KB lol