I had a '97 with 157K miles on it, and the truck was used and abused.
I bought the truck in '99 for $10,700 and Toyota gave me $9200 in trade for it.
I walked away with a 2007 V6 Access Cab with 11K miles for $14K!!
Even if you don't want to get another vehicle, you might want to really think about it. Chances are inspection stations will be well aware of this situation and fail inspections because of it. Then you have a vehicle thats essentialy worthless and you have to sink a few grand into to resolve the frame rot issue.