^^^ Don't get too upset. The quality of the barrel has a lot to do with the price of a conversion. ER Shaw bbls or the house brand bbls at Midway can save a person lots of cash on a OEM quality barrel for a caliber conversion.
Me I'll be spending $300-$400 on a Match quality hand lapped barrel that should be more precise, foul less and clean out easily.
I've shot OEM quality barrels long enough to know the performance can be quite good but rarely approches that of a Match Barrel.
Yes, they do set you back as much as a new Marlin XS7, Stevens 200, etc. but consider the reloading time and cost, range time and cost spent chasing smaller groups, (if your into that sort of thing) overall cost will be dramatically reduced by having the best quality barrel you can afford.
If your hunting or plinking you probably don't need that match barrel and $100 should do.