Looks like you have a 38 Double Action, Third Model shipped from the factory in the late 1880s. Certainly qualifies as an antique by BATF standards. This model was made from 1884 to 1905, with serial number range from 119001 to 322700. Over 550,000 38 DAs were made, so value is not high. Your revolver has seen a lot of use as indicated by the worn checkering in the grips and it has been re-nickeled in the past as well.
If it locks up tight and is in sound shooting condition, it will handle current 38 S&W ammunition just fine. The price is OK if it functions without problems and you should be able to find replacement grips. I would consider replica grips from Vintage Gun Grips, since they are less expensive than an original set, plus are usually well made.