This goes to prove that you need to read all eBay postings quite closely:
http://www.ebay.com/itm/6-5mm-f-3-5-Opteka-HD-DC-Fishey (sic)-Lens-for-Canon-EF-EOS-Digital-dSLR-210/191765772323?_trksid=p2045573.c100033.m2042&_trkpa rms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc% 3D20131017132637%26meid%3D3df1373cdbf242a88d623e79 6f782ad0%26pid%3D100033%26rk%3D1%26rkt%3D4%26sd%3D 191765772323
The posting title lists: 6.5mm f/3.5 Opteka HD DC Fishey Lens for Canon EF EOS Digital dSLR and shows a picture of this lens.
Reading the entire ad you come upon:
Lens System
Type Image Stabilization, Macro/Close Up, Wide Angle
Focus Type Auto & Manual
Focal Length Fixed/Prime
Focal Length (mm) 28mm
Aperture F/1.0, F/1.8
Min Aperture 22
In another case, recently I placed a bid on a TTL flash unit that was listed for an Olympus E510. I wanted to give this as a Christmas present to one of our volunteers who uses the E510 which was generously donated to our dog rescue program by a CiC member. Reading the fine print below the main portion of the eBay posting, it appeared that the flash was not for an Olympus at all. I queried the seller who admitted the mistake and refunded my purchase price immediately.