CBASE BBS is one of the better 64/128 BBS programs still available.  It has many unique features and I ran it for several years.  To the best of my knowledge both versions are still available.  The 64 version had a bit more support than the 128 but the 128 was the better programs.  They both support all commodore equipment including ram expanders, & 1581 drives etc.  They also are very supportive of CMD's line of Hard Drives, Ram Drives, JIFFY DOS, Swiftlink etc.

The fellow to call is Guenther Birnieks and his voice # is 301-761-9773 and the BBS number is 301-761-0306.  

I don't have current pricing but call and check it out.