OK, you're going to have to file a Maryland 510 because the LLC/S-corp has MD source income from the sale. The LLC won't pay any tax to MD but it will pass the income through to members who will have to file an MD return to report the income that had an MD source.

if I paid tax to Maryland, should I pay tax to the Virginia on same income which I made in Maryland? 

Yeah you have to pay tax to VA but you should get a credit for what you paid to MD.