Chuck Penrose

Hi all, Is this forum still active? Here is my question. Probably asked a thousand times. I sold my 2010 Silverado LTZ, got a good bunch of money for it. Only used infrequently. Looking to replace with a less expensive option. Found a 1999 GMC new body style that has 213K on it. Seems to run drive fine. Owner has spend a lot of money on it. BUT Still has original 5.3 and original 4L60. Trans is working fine. Engine runs fine but uses about a quart every 3000. Owner is asking high retail for it right now. 8K 1. how long can these 5.3's run without a real rebuild? seems to be taken care of, oil changes and such. 2. I knw about the valve cover fixes and the oil pump fixes. Would a reseal and new gaskets be the ticket? Or is 200K right there where things go wrong and a rebuild makes sense. 3. I am assuming the 4L60 will need work. 4. needs tires and brakes this truck has 1. rebuilt front suspension 2. junk yard transfer 3. good body and paint 4. nice Denali replacement interior 5. lot of small stuff replaced 6. electrics all seem to work 7. rear diff and axles have been rebuilt to some degree. So, buy or not and for what price for that high milage? All thoughts are appreciated.