Seems reasonable; but it really doesn't matter how long ago he sharpened it - it'll hold an edge forever if you're not using it.
If I'm going to have my knives professionally sharpened - I better be able to shave with them when they're done.
What type of steel are your knives? If they are cheap stainless or a softer metal - I wouldn't bother. I'd only pay to have more expensive knives with good steel professionally sharpened. Generally knives that hold an edge longer means it's harder to sharpen.