Why would you make such a remark without ever seeing the van in person? Why would you give the impression that it's overpriced? It's poor form. Try itemizing all the listed parts and accessories and the time and labor costs associated with building the van. Not everyone has the means, skills, and time to build a van from scratch.
I'm sorry if this is your van
I commented on a random Craigslist ad with plenty of pictures and description to make my comment and as a followup to another's post "That one's been out there for a while."
There is a reason That one's been out there for a while.
If it were priced at $33,000 would I be criticized for writing "At $33,000.00 it will not be out there for very long." as an opinion?
If it is your van, best wishes for a quick sale.
If you are a potential buyer... you have my opinion, take it or leave it.