NO! This smells fishy. Not worth losing your amp and money for. I suggest letting this "buyer" go and selling to a 'phile you've spoken with by phone - to get to know them - that they are "normal" - like you.
And to ensure that they won't be some kind of problem ( some are mega perfectionists in terms of condition and will return you the item because the REALLY want a used item at used price but in super-pristine condition .....or they want the item picked up by someone else - then they claim they never received it.....or they'll your with a cashier's check or certified check - conterfeit versions of which are readily available to to internet thieves...etc
And to ensure that they won't be some kind of problem ( some are mega perfectionists in terms of condition and will return you the item because the REALLY want a used item at used price but in super-pristine condition .....or they want the item picked up by someone else - then they claim they never received it.....or they'll your with a cashier's check or certified check - conterfeit versions of which are readily available to to internet thieves...etc