to me scope does not have a lot of value , but the rifle has value this is a very vague price range $900.00 - $1500.00 maybe more ? if it was a model 70 the value would be more.
The Lyman A5 has plenty of value. Minimum $500 these days, more if in sparkly condition. I assume it's mounted via the factory receiver ring holes + rear sight dovetail? If period-vintage external adjustment target/hunting scopes (Fecker, Unertl, Lyman) are employed on the M54 there's no need to modify the bolt handle, it's how the factory intended their use with scopes.
The Whelen-designed stock was the only stock presented on the M54 Hornet, which was intro'ed in 1933 and discontinued 1936.
I paid $2K for a pristine one with a correctly mounted pristine Lyman Junior Targetspot 8x on it four years ago and figured I got a pretty good deal. Such scopes are now selling for $500-700, slightly more than when I bought the rifle.
Mine's quite accurate - 3 shots 1/2", 5 into 3/4" typically.