It's worth what someone is willing to pay. I would suggest looking at NADA, KBB etc to get a value, as well as CL, FB marketplace, RV trader etc to see what units like yours are selling for. Deduct a considerable amount for the roof leak. You said you sealed it up but is there damage from the leak - rot or mold? With a fairly saturated market of used RV's and money being expensive right now those factors will come into play. Someone expects tires to be in good shape and will deduct from the price accordingly if they aren't, so having new ones on doesn't increase the price, it just keeps it from deducting from the value.
