Even though a value will be decided based on what the buyers are actually willing to pay (you can list it for $50,000,000 but get $100k offers), a business is mostly valued at profit × months and this is probably most accurate. So based upon the few details you posted, i would say $150k-$300k would be a fair price, if you can provide documents of the said income and actual profit. you can expect people to lower you anywhere between 25%-50% of what you are asking, so take it into consideration. Good luck!