I have an oportunity to buy a Marlin Model 90 DT, .410 ga, 26" barrels, imp. cyl/mod. Not sure of the year made (serial no. 19xx) but it has a web between the barrels. It is in excellent condition, original butt plate, good wood, and at least 95% on the barrels. Asking price (firm) is $1200. Is that a reasonable price? If not, what do you think would be a reasonable price?