Amazon has the Bugera Trirec Infinium 100W guitar tube amp head [amazon.com]
on sale for $507.95. There is a 20% checkout discount available for Prime members making the pre-tax total $406.36. BUT, also listed in the product page is an Amazon Harmony link (explained in this thread
) to receive a discount promo code over the phone to further reduce the price. This should be either 10% or 15% according to other recent deals.
There are 15 available from Amazon as of this posting, so don't wait too long!
EDIT: Dead, Amazon raised the price to $660