Pick up a new rechargeable toothbrush for $49.97 from Amazon.ca or Walmart and get $20 back by mail in rebate.
Oral-B Professional Care 1000 Rechargeable Power Toothbrush is available for $49.97 at Amazon.ca right now. This is the basic model with round head and Daily Clean setting and one brush head, although most Oral B heads fit so you can buy different shaped refills for any 1000 model if you find that you prefer a different one.
If you prefer to shop in-store, Walmart has Oral-B Professional Deep Sweep Triaction 1000 Rechargeable Electric Toothbrush for $49.97. This has a bigger head for deep cleaning and also has one Daily Clean setting so is a basic but effective model.
Once you have bought your toothbrush, send in your receipt and UPC to get a $20 prepaid Mastercard gift card by mail using this mail-in-rebate form. You will get your toothbrush for just $29.97 (plus taxes on the full amount) after this rebate. This offer was really popular when offered at Target before they closed, so may sell out quickly at these prices.