Hi, I have a 12ga 147E that I use for duck hunting. Mine has a pistol grip and SST. These are really quality made guns. Typical German make, built like a tank, more locking "devices" than a bank vault. Mine weighs in at 6-14 and is not a bad handling gun at all. It's been a very reliable gun, no issues or problems with her. Mine was not hard opening as some are (this is a typical complaint). Overall, IMO these are top notch guns and will give a lifetime of good service.
As to value, guess it depends on how much you paid for it.
Merkel USA still lists the 147EL (which has fancier wood) and the German catalog has a model very similar if not the same as the 147E.
I think you'll like your gun. I hope you have many long and healthy years shooting her>
Keep us posted and post some pics!
Best!
Greg