What you get from WBAC depends on what BCA that owns WBAC is getting for the cars at auction. They have a very sophisticated and very accurate method of pricing what they will offer for a car based on what that car is currently fetching at their auctions. If convertibles are fetching more in the summer (which they are almost bound to be) this will be reflected in the offer that WBAC makes to you. Normally, convertibles tank once summer is over and are at their lowest in November, but an RC is a bit better because it has a solid top.