If you need it go for it. I have had more than one Chevy truck with more than 200,000 on them before I got rid of them and they were still going strong. If it has been maintained properly it should not be a problem. If you have a personal mechanic you can trust get it checked out. Run a Carfax to check and see if it has any major stuff going on with it. Have they used it for 100,000 towing? Trans should be serviced at 100,000 especially if they have been using it for towing...