Anywhere from 80 bucks to 200,..200 is absolute high for mint condition.
I had one growing up for plucking tree rats and other assorted vermin.
2nd edition Gun Digest,copyright 1946.
It shows the H & R Standard Model 48 as "The Topper" available since 1944.
It lists the following info:
A new model,fitted with an entirely new action,so constructed that it will automaticlly take up wear.American Walnut stock and fore-end.Case hardend frame,coil springs throughout.Positive automatic ejection.Hard rubber butt plate.
12,16,20 guage in 30" barrel length only.Weight about 6&1/2 lbs.FULL CHOKE.For any standard factory loaded ammunition.
The third edition (c/r 1947)says the same thing.The top of the page listing single barrel shotguns says"all full choke".
The fifth edition (c/r 1952) lists it as also being available in .410 and full and modified choke.Barrel lengths are 26" & 28" in 20 and .410 and 28" & 30" in 12,16,and 20 gauge. Price:$21.50!
No real change in spec's until the 1957 (eleventh edition) when it says:
Barrels:30" or 32" in 12ga. 28" or 30" in 16 ga.. 28" in 16,20,28,and 410 gauge.FULL.
The 1959 edition (number 13) drops the 28 gauge and the model 44 in favor of the 148 and 188.(The 148 was offered several years earlier in .410 only.Also it was the first year for the new "side lever opening" .It also offered a 36" barrel for the 12 gauge for an extra $2.00.
The model 188 had colored stocks (red,yellow,blue,green,purple,pink,or ebony) that I guess were plastic.The 1960 edition shows the same spec's except the model 188 dropped all the colors except red,yellow and ebony.
best to keep it and hand it down
Take your kids hunting now so you wont be hunting for your kids later: Ted Nuge