Has anyone seen these cabinets in person? http://cgi.ebay.com/ebaymotors/NEW-SANDBLAST-CABINET-TOOL-4-AIR-COMPRESSOR-BLASTER_W0QQcmdZViewItemQQcategoryZ43986QQitemZ4602374398QQrdZ1QQsspagenameZWDVW Are they pure junk or can you use them? do they seal or is the metal to flimsy? there seems to be a bunch of them available, maybe a harbor freight item. The shipping kills the price in this ad, but I'd keep looking for this model if it was decent. thanks in advance.