In my opinion, low to mid $XX. Although, it has a nice sound to it, "weekly" isnt' a popular word used to describe personal or payday loans.
But don't let me discourage you. Look at LowerMyBills.com. If you've never heard this name before, you'd think the domain itself doesn't sound all that professional nor catchy, and yet it's a multimillion dollar company. I believe domain name values really come from what you make of it, unless its a truly generic one-word or two-word name, like business.com or horseracing.com.