This deal was popular last month https://www.cheapies.nz/node/24016 and I noticed it was on again. Only one week so ending this weekend, so a little late. But if you normally do your shopping on the weekend guess it's no biggie. Note that you should be able to get a better price by asking for a price match at the Warehouse.
Note as I remarked in one of the comments on the last deal, Oral-B has both Pro Health and Pro Health Advanced in NZ. Pro Health seem to be 130g but aren't stocked in Countdown stores but are in some Pak'n'Save stores. Pro Health Advanced are stocked at the Warehouse, Countdown, and also stocked in some Pak'n'Save stores and are 110g.
Was able to price beat at Warehouse without problem, $1.98. Note that Warehouse has Gum Protect which seems to be same range and price. However since it's not stocked at Countdown or at least not on their website, you probably won't be able to get it unless the staff member doesn't look properly.