Yes, there's WC Blue Cuckoos, WC Blues, and though rare, solid blues as well.
Blue x Tolbunt or even simply Gold Laced = blues and blacks with tiny bit of leakage. The thing is, blue and black are just that. E/E extended black and one blue allele. Laced Polish are a whole collection of things; - E^R/E^R crowwing (instead of extended black) Columbian restrictor, Darkbrown, Melanizer, Pattern Gene. . . . It's a lot that when crossed out to simple blue or black then back in can get you a whole ton of different odds and ends in color, but once you throw in recessive mottling, it can be tricky. To most people just about any brown leakage will look identical to a Tolbunt (proper good lacing)
It's really up to the buyer. For just 5 eggs, that's quite a risk. From the photo I see those blues are just plain blue, when grown will either be solid blue (w/mottling or white crest) or blue with leakage (w/mottling or white crest)
So I hope the seller actually means Tolbunt AND WCBlues. Who knows. It's up to the buyer to decide, but just as a warning to those interested - There's no blue Tolbunts there.