I understand audio budgets but I suggest you start searching in the USA for an Accuphase amp. If an amp is purchased from outside the USA, you will need to pay for shipping, both ways, for repairs to Japan, for example.
My friend purchased a preowned amp, it stopped working and it cost $3,000 for shipping (both ways) to Switzerland for repairs.
In addition to eBay and Audiogon, I suggest you contact USA Accuphase retailers and ask them for preowned units. You never know what might happen until you ask. I suggest you tell the retailer your budget amount and see what happens.