Design: G21TW4-6 Serial Number: 40R1A2JH1YA016084. Purchased brand-new in 2000 for my 21' Boston Whaler (21' Ventura). Updated to disc brakes. Low miles - used for watercraft storage, introducing and a few river journeys. Introduce ramp extremely close (100 yards) from parking spot. I am the initial owner. Dealer says that it's worth $2500+ as is. Examine it out and make me an offer. Required to sell! Clark x107.