Typical interest rates for a private loan to a purchaser?

[Randy Cheval]

I'm selling a lot to someone that wants to buy in installments because they don't have enough cash today to buy.

I'm willing to sell on time and carry back a note and was wondering what you guys suggest for an interest rate.

They will put down $3,000 and I will finance the remaining $7,000 over 1 or two years. Purchase is for a vacant lot next door to the purchaser.

What interest rate is typical for this?