Here is a little helpful hint...
I got some 30g tanks just like those and almost couldn't give them away. They are only desireable to a breeder or wholesaler. Smaller reptiles can be housed in them but the hole will have to be patched. The air blower is not usable in a small scale operation (I have one too). The tanks seem to hold all of the value in this auction. That breaks down to 8.52 per tank. You can move them on eBay in lots of five or ten but the profit will be low. They are all drilled and no one wants a drilled 20g unless they are going to plumb them into the same filter. What made my purchase worth it is I got lots of small equipment that I was able to use. Ask for pictures and an inventory of the equipment.