It's hard telling what it is - you'll need to take a look at it and get a model number. H & R made a lot of different 22 revolvers - some with swing out cylinders, some that you had to pull the cylinder pin and take the cylinder out to reload, etc.
I had a "Sidekick" (I believe a Model 929) with a six inch barrel - 9 shot - blued. They also made that in other barrel lengths. At the time they were made, they were "inexpensive" revolvers (as compared with Colt, S & W, etc.) but they were rugged little revolvers intended for general use. I had an accuracy issue with mine that we could never figure out but others that I knew that had the same model loved theirs and they shot well - great plinkers.
Value is going to depend on just what it is, the condition of the finish, etc. From what I've seen over the last few years, these types of revolvers were not really that "collectible" but that seems to be changing and I'm surprised as to what some of the prices I've seen them go for at auctions or on GB.
See if you can get a Model # or if they will let you take a photo of it that you can post - someone who has the knowledge on them should come along and be able to give you an idea.
Today, it's kind of hard to find a 22 revolver (new) that you can buy for under $200.00. The Heritage Rough Rider is one of them - I have one and use it for a "knock around" gun on the farm - a nice shooter, etc. but certainly not a Smith or a Ruger. When I bought my H & R Sidekick - I think I paid $125.00 for it - at the time I thought it was a bit high but it was in perfect condition and I wanted it to teach my wife to shoot. I'd still have it if it wasn't for the problem I had with it (and I'm not knocking H & R - it was this particular pistol).
If it catches your eye and you like the shine and the pearls - take a closer look and see if they'll dicker on it. The most they can say is "no", In the end, it's worth what someone is willing to pay for it. On several occasions I have run across handguns that just "spoke to me" but that I thought were a little high in price (used pistols). Some I have passed on - several I haven't even though I thought they were $25 or $50 too high. One was a S & W 38 spl. M & P - I felt it was a little high but the seller wouldn't budge - I paid it and have need regretted it as it's one that I shoot the most. The pleasure it's given me far outweighs the $30 or so that I thought was "too high".
Good luck and if it's something you really like and want - I hope it all works out for you!