Sumo Citrus® in the NY Times in February, which helpfully shared that it was available in the NY metro area for between $2.99 and $5.00 a pound. What's in New York, gets to Minnesota in a wink of an eye, and I bought one yesterday for $3.99 a pound at Byerly's.
It was worth every dime. Great flavor, no seeds. Get 'em while there here. I suspect that the season will be incredibly short.