Interesting! I got 3 BRs, the non-matching kind, but got one that matched. A Dec. '44 receiver with a 1-45 barrel. I could only imagine it was included in the $100 group because the rest of it was bad. (Barrel M > 5, TE 7.5 - 8, and the receiver with heavy pitting on the receiver ring face). Cleaned it as best as I could, but I doubt I can salvage the receiver. I may call and ask them what I should do.
Alex