When they come back they argue the living crap out of you. "Why should I have to pay so much...wanh wanh wanh...the bike isn't worth that much...you didn't call me...I had personal stuff going on...wanh wanh wanh..." Usually I just end up giving them a discount on the storage to get them the heck out of the shop without being nasty towards them. Instead of being an adult and saying hey, I screwed up big time, they whine like little petulant children to get their way and I don't have the time to argue all day. I would much rather make sales on CL or in my case just donate the bikes to charity and get tax writes offs.

If you leave a bike for that long with no solid communication from both ends, you aren't really someone I want in my shop. You don't care about the thing and to you it is a toy you play with when you don't have anything better to do but want someone else to keep it so it doesn't fill up your own personal space but you also don't want to pay that other person to keep it and wouldn't want them using it.