I keep coming back to this so I'm finally going to point it out. Every g-dang major shipper (UPS/FedEx/USPS) will come to your door and pick up packages. You don't have to go anywhere to get it into their hands. Why, after clearly printing the shipping labels, Mikhail doesn't just dial 1-800-GO-FEDEX like everyone else in the country is beyond my reasoning. Unless, unfortuately, he doesn't have anything to ship in which case it's convenient for him to be able to blame FedEx processing delays (bullcrap) or anything else he can think up.
And no, there isn't a size limit on USPS packages (well, there is, but an amp wouldn't violate it by a long shot). All that is required to ship items requiring more than $5000 worth of insurance is the use of the Registered Mail System. RM can be used with both First Class and Priority Mail shipments, carries a minimum $10 fee (plus insurance) plus all regular shipping expenses. I ran a rough estimate for Dan's package this morning and it'd cost about $80 to ship the amp via USPS Priority Mail with Registered Mail including $10,000 worth of insurance. The same, 24"x24"x12" x 20lb package shipped through FedEx is probably going to cost ~$110. Shipping F'ing Fail.