For something in the middle of the price range, we've got your back with this Tibi Rollneck. This piece is bound to become a total wardrobe staple. It's also worth considering this Loro Piana Turtleneck. This piece is ultra popular and, just as importantly, not very expensive.
If you're looking at it like an investment piece, then you absolutely must check out this Chloé Rollneck. This piece seems costly, but it's well worth it.