In another post, I told how the Battery Minder was on sale for $17.99 one month, and $29.99 the following month. Well the deal just got worse. In today's mail was Northern Sales catalogue, with same Battery Minder is now on sale for $39.99, plus shipping. Makes me glad I bought one for $17.99, less $5 off coupon ($12.99 + tax.) Same exact model, just price keeps going up, and up.