We have owned this powerful and rare domain since year 1998 making it very well-aged. "UF" is an excellent short 2-letter acronym. A similar name NM.ORG sold as a Northwestern Medicine acronym for 35k. Two letter domains are quite rare with just 676 of them possible with very few being for sale.
UF.ORG is priced at a reasonable level when you consider its numerous usage possibilities, being so short and great rarity. In the past "UF" was a website about "University Futures" Of course, UF can be used extremely well for any purpose or category, "UF" has an impressive 150 million results in a Google search.
UF.ORG is offered for sale because of owners planned retirement. In fact, a desire for retirement income is a reason the owner is willing to accept a monthly payments plan and also to a buyers benefit.
P.S. Do not worry, about your use of the domain while on monthly payments you will have full use of the domain name (the same as you would if you paid purchase price right away) and be able to use your own DNS immediately upon making your first payment.