Evson is encoded. I would never buy their script. It isn't even that impressive. Geodesic looks good but is very expensive. In addiiton their email addresses don't function. Doesn't give me a good feeling. Their mid range scripts are missing some essentials which is weird. I looked at Almond Classifieds but their mailbox is completely full and you can't reach the. It looks pretty powerful considering the price and the ability to have multiple parts per cateogory, e.g. jobs different than computer parts.
The last one I saw is chameleon. Has its good parts but I don't like the framing.
This should be easy. All the good ones are currently in perl and I'm hoping that someone else has a better solution. Evson is absolutely a no go and no reason to go encoded.