Garmin Varia RTL510 £141 Deal & £129
This is a good set of prices, not quite the best ever.
UK readers should also the WIGGLE option from the blue Garmin image below, the prices are near-identical there with 16$ off and, of course, discounts off other Garmin items too.
There is a whole swathe of non-Garmin & non-Amazon deals starting now and going through to early December. They will all be linked to from this link HERE or via the black and red image, below