Sempervivum x 'Aymon Correvon'
http://www.wrightmanalpines.com/category/genus/sempervivum
$6.00

Sempervivum 'Alta'

rosettes to 2"

Echeveria globulosa
http://www.collectorscorner.com.au/Cacti/Echeveria%201.htm
Rosettes depressed-globose, dense, 4-5.5 cm (1.57"-2.17") wide

Echeveria albicans

10cm (3.94") across

http://www.collectorscorner.com.au/Cacti/Echeveria%201.htm

7cm heads $5.00 each

Sempervivum montanum
 rosettes to 2-3 inches in diameter