If the serial number starts with RM, it is a Remington made rifle. But it was not made in 1995. A RM serial number would have to have been made after 2010. It will also have checkered stocks.
What you show in the photo
is a JM Marlin. In fact the JM barrel stamp can be seen in the photo.
Remington made rifles have their serial numbers etched on the left side of the receiver. JM Marlins of this vintage have theirs stamped on the tang. The expected circled JM stamp would appear on the left side of the barrel, near the receiver. But the stamps and frequently only partially present--sometimes only a portion of the circle and maybe a bit of the J or the M. But it's still a genuine JM stamp. See below.
Value is dependent entirely upon condition and whatever you and seller agree upon. Your offer of 750 sounds to be within the ball park for a good condition rifle at this crazy point in time. Remington made Marlins had quality control issues for the first 10 years or so. This included poor wood to metal fit, canted barrels, rough internal machining, and even a few cracked receivers. However, the majority of them were reasonably well made. I would recommend you go over the rifle carefully to make sure it meets your standards before you buy it. If this is a rifle from an auction site, the same thing goes. Make sure you are allowed a reasonable inspection period and full refund.
Repost if you have questions.