Shootingstore.com They are $234 you give them a deposite and have it shipped to your local dealer. The prices change a little amoung dealers so if you have more than one local to you check them all. I have purchased 2 guns this way and had them delivered to B&k in Natick. it was very fast and...
10/22 is your best bet. They are inexpensive and accurate right out of the box. Put a BSA sweet 22 scope on it with an upgraded sear and you will be amazed. The 15-22 is also cool but it is more money and not as accurate.
The 10/22 will also cycle just about anything. Another cheap upgrade to...
I would not worry about it as long as the floor is solid. My safes are in the basement but I had a stand with 2 50gallon fish tanks with no issues and that was on 4 fairly small legs so the lbs per sq in was crazy. With a safe wit a foot print of 24X24 even at 900 lbs is still only a couple...