Two Thomas Barker hammer guns were listed in the 1902 Sears catalog in the imported guns section. One was plain with "Twist Finish" barrels @ $10.40. The other was Hand Engraved with "Royal Damascus Finish" barrels of Wilson Steel for $1.00 more or $11.40. Personally I would not desire to spend a lot of money on one of these guns.
If you are desiring to do the re-furb yourself then if it can be bought cheaply then it could be a good Practise gun but I seriously doubt the end value would be worth the cost of paying someone else to do the work.
