Answer for Anyone buy plants?

It sounds like this is a pretty big specimen, that is the trouble, it may be hard to find anyone who is willing to put in such a huge amount of work for an agave.  Send some pictures to us, the other local nurseries & or put an add up on craig’s list.  Maybe checking with local landscape maintenance companies to pot it up for you.  You might get close to breaking even between the cost of removal & the sale of the agave.