Home Depot offers the Jiffy Professional 72-Plant Greenhouse Starter Kit, model no. J372WPRO, for $7.98. Opt for in-store pickup to avoid the $5.99 shipping charge. Excluding the below mention, that's tied with last week's mention and the lowest price we could find now by $7. The kit includes 72 7-peat pellets, a base tray, clear greenhouse dome, and plant labels.
A close price: Walmart has it for $9.59 via in-store pickup.