What they think of rebuilding an engine with 8,085 hours total time and how many times and how well it will rebuild.
It's likely that very few parts remain of the original engine besides the data plate, especially true if it ever got a factory overhaul.
A Garmin 430W (not to be confused with the non-WAAS version) still fetches a premium on the used market, at more than $7,000 on eBay. Add the rest of the avionics in and you could get at least $11,000 slinging them on eBay.
The engine core is worth at least $5,000 if completely runout. Engine accessories can be sold off separately. Figure you can sling the prop for another $1,000 and the airframe for $4,000.
My rule of thumb is that if the price of the whole is less than the sum of the parts, you can't get too burned and should pull the trigger.