I'm not trying to be pedantic, but if you've used it on all the releases on the discogs page then how come you also state in the same article that it hasn't been used for years?
just wondering like..
It's hard to know how much these things are worth now, personally I think the price is a bit ambitious, but then again I suppose anyone who actually has any money can bargain like mad, which probably has been built into the price no doubt! :)