Was that the same one some lucky bastard got for +999 when the owner listed it incorrectly?
I have a T5 and even after enhancer and markup costs it's better dam/pec than most other weapons. Of course, you need the skills to use it. Problem is, most people with the skills also want bigger guns which deflates the price a bit.
I wouldn't sell mine for less than 15k because I couldn't buy another weapon that would do the job for less than twice the price. I can use it unamped/unenhanced for small game, amp it for medium or enhance it for bigger stuff and get great dam/pec in all configurations. It's not an event winner or an uber mob gun but it's great from someone like me who has the skills to use it but not the peds to buy a 50k+ gun.