Don't do it. Keep in mind that the dentist makes sure the surface of the prepped tooth is clean, dry and sterile before refixing the crown on it. You could be setting yourself up for severe decay and infection under you crown.
Why are you being charged to reset it? I've had a couple pop off before and my dentist never charged me to reset it. He considered that part of the cost I originally paid for what was supposed to be a permanently cemented crown.
bad move recementing it on your own
1. dental cements are not "glue". Glue is toxic.
2. Crowns come off for a reason. It is likely there is something wrong with the tooth underneath.
I would not do it yourself for a number of reasons. You may think you are saving $85 in the short term but may be doing damage that will cost you alot more in the long term. Do yourself a favor and don't play dentist. Let the professionals do their job.