If you are looking at just the interior than you better be paranoid. H1s (Ive had 3 of Them) They are a beast of a whole other species. YOU MUST MUST MUST get a report from any Hummer/GM Dealer that can run the vin to see what has been done if anything to the H1 over the past 10 years. $36,500 is way to steep for a 99. Its not worth over $30 at the auctions. Iam a wholesale car dealer and 99's are selling $27-$29 MAX. I dont want to rain on your parade but owning an H1 is very costly and frustrating. Unless you are preparred to spend a great deal of money (Cause 99's need lots of help) than I would not settle for anything less than a 2003 model with an extended warranty.
Here is my H1 over the winter time.