Find local dealers selling different years and models of GMC conversion vans through sites such as Autotrader and CarGurus. Alternately, sites such as Craigslist and eBay offer listings from private sellers.
Buying a used GMC conversion van from a dealer provides the buyer with both legally mandated protection in the event of an issue with the purchase as well as the comfort of knowing the van was inspected by the dealer and a certified mechanic. However, despite the laws surrounding used auto sales, some dealers provide a better experience than others. As such, the dealer rating system on CarGurus is helpful for differentiating dealers that offer reasonable prices and reliable vans from those that overcharge or have a history of selling vans with hidden problems.
One of the biggest advantages to buying from a private seller is the decreased price, which comes at the loss of many of the protective systems in place with dealers. When buying a used GMC conversion van from an owner, the buyer needs to inspect the vehicle for damage herself before making a purchase. Craigslist does not offer any protection in the event of fraud or faulty performance; eBay does offer limited protection in certain situations.