Bought some garden tools yesterday, looked at receipt when I got home, only got charged 1 cent for a NIB Fiskars machete. Went back a few hours later, got another, went to a man operated register (had used the auto check out the first time) and it rang up as 1 cent again. To alleviate my guilt, I asked about it. They told me it happens from time to time when they are getting in a new product and need to clear an area.
If you get a chance, check it out.
(I realize this isn't firearms related, I had to pass this on though. Delete as appropriate.)