I'm looking at a 1998 Chevy Express Gladiator conversion van. It has been kept in real good condition, and has very low miles. When I tried to look up the value on KBB.com, I was unable to find an option to indicate that it's a conversion van. The best I can do is select the higher value trim package which leaves it about $2300 under the owner's asking price. (not that I'm trying to prove it's worth in his mind, I just want to know how much the bank will loan us for it.) I'm sure that the conversion gives it more value, but can't seem to find any guidelines as to how I should calculate it. Any help will be appreciated.