Back in the day, saturdays used to be the day to kop an outfit for the weekend. Whether it may have been the new Jordan's, or a pair of uptowns, these saturdays were monumental for selling out entire product lines. Cats back in the day referred to these as "Blowout Saturdays". Buckdime is an expression used to characterize what you were able to get on these blowout saturdays; a pair of kicks and usually a tee to match. For all of that you payed a buckdime ($110).
Yo son i got this shit for a buckdime.