The reason you found none on E-bay is because they don't sell. You can't ship them as its way to costly. If you don't happen to attract a couple people close by, you get no, or just one bid. I've ran nice large signs a few times with a reserve to just try them and only got the $1 starting bid. I later sold them at a large consignment advertising auction and got $300 each. I've seem a lot of large Texaco signs...they probably are as common as the large Standard signs(at least in my area) and $350-$500 max is a realistic value in my opinion.
