A V-Rex is a great bent, not just for starters. It's one of the best all-arounders out there (IMNSHO). There are many tales of people thinning their stable by selling their V-Rex, only to have 'seller's remorse' and end up buying another.
V-Rexii go back a looooong way, so price is dependent on age, but $300-500 for a middle-aged one in good condition would be fair. I take it you already found one and are trying to decide if it's worth the asking price. One is currently for sale in my club's newsletter, a 2003 for $300.