Thanks for the advice Nottslad. I really respect your opinion.
I'm in agreement with Nottslad. I'm not seeing any sites go for more than they made in the last 4-6 months lately with very rare exceptions. If it's still making money, I'd keep it. It only needs 1 sale a year to pay for itself, no?
If you do decide to continue with the sale, I'd revise the sales copy to sound more positive and pointed.