Found this thread doing some due diligence on a pair of DVA M225 monoblocks.
My first thought was: Yes AVA is a VERY small outfit with an 84-year old principal who may--or may not--be as focused on customer service as some would like.
If you do any research on AVA, however, you will soon realize that this is more a feature than a bug. Spend a bit of time getting to know who you're buying from and decide accordingly how much uncertainty (in terms of scale, support, viability of business model) you're comfortable with.
Second, as with many threads on the 'Gon, I always wonder which posters may be industry participants (manufacturers, dealers, salespeople) and what motivation they might have for posting. A blue checkmark would be helpful, perhaps :~)