'Collection only' will limit potential bidders to those within say 1hr max drive (possibly less). As you say it's 'presently' quite cheap; however, bidders generally keep their powder dry till the last 10 seconds (as you will likely do), so early price isn't an indicator of final price. When you consider what a GK 2x10 cab and separate 700rb amp will cost you, then it will likely still be a good price when it ends.