Briley wants $199 to thread a barrel plus 3 chokes. However, their charge for a single breach loading barrel without tubes is more [$130] than the same work for an auto/pump [$95] without tubes, so.....their charge for a Pardner barrel with tubes may be more.
The prices you mentioned for the work done through Gander Mountain sound pretty good, compared to Briley! Did they say what type tubes they use? [Browning, Remchoke, Winchester.....?]