Heya...
Last year I ordered from amigakit. I ordered an a1200, with 3.1 disks. I picked up an a500 from ebay, because I needed the 110v psu.
I had a minor issue with the disk set, I only ordered 5 disks somehow, I can't remember exactly what happened. The nice folks from amigakit did send me the install disk.
I also picked up a couple of software lots at auction, so that I would have some stuff to play with.
I would also recommend that you consider the cardflash adapter so that you will be able to get additional material onto your system.
Shipping costs sucked, but everything arrived fairly quickly and undamaged.
Good luck