There is a guy on gt,selling his boss js10
He claims he has no need for it,he posted his #
Worth checking out.they sell for $429.
I paid $386 for mine and love it.
Since buying the boss,i barely play my other tube amps...
Its has amp modeling and effects,and you can record ur self over a back track of any genre.blues,metal,rock ect.
or you can play and record without any tracks.
Its an awsome learning tool too.hit him up u may get a good deal.btw you can find that js10 for sale on the recording forume thats were it is.and the js10 has drum beats too..,.go for it goodluck.