perusing local distributor, price check

[YPants]

i know next to nothing about wine in general, a bit more about champagne but fa(aaaa)r less than all of you probably. i was under the impression that stuff like the ones listed below would be a fair bit more expensive. these just look so cheap, am i wrong?

lanson vintage 1976 magnum bottle $580

Orpale Grand Cru Blanc de Blancs 1996 $120

De Meric Brut 1996 $70

H Blin & Co Brut Millésimé 1996 Magnum Bottle $100

[muichoi]

Not particularly good wines, Ypants, and not underpriced, particularly the Lanson.