Hmmm , the. Vixen looks to be an excellent deal , the GPDX alone is worth that , can you arrange to see it in the flesh. , so to speak ? .
A scope and mount of this quality should be worth a lot more , I might be wrong but there is an old saying. , If it seems to good to be true it normally is . But hey if kosher its a really good bargain.
Again. , my 5c good luck a please keep us informed as to your next move.
Brian.