I Got a Call Back From One of My Letters, But Seller Wan'ts to Sell at Retail Price

[Sierra Murphy]

I started my yellow letter campaign two days ago and I received a call back this afternoon. The seller left me a voicemail saying he wouldn't want anything less than 400K for his property, so basically retail price. I want to call him back but I'm kind of lost at what to say. He said not to call back to waste his time if I'm not serious but I feel like I should at least tell him to use me as a last resort. I want to be respectful of his wishes but at the same time I want him to know that I'm interested in the property....just at a discount. What should I do?

Thanks