That's a little bit of a Frankengun with the Olde Worlde front post, but a new fangled RIS handguard. That's handguard doesn't really add extra value for a purchaser unless you can find one that's after that specific combination. And grips, suppressors and mags are more what you'd call free gifts or sweeteners.
I reckon that's a Delta Armory DA-A02-ETU ALPHA, so £250 new, so maybe £175 used for the base gun. £200 isn't an unreasonable ask - and you might get it at this time of year - but unspecified "upgrades" would actually put me off. I wouldn't even mention that, just what it's chronoing at, if you know.
Expect plenty of lowball offers, and "Swap for... ?" asks.