B&H also has the 512GB microSD for $89.99 . I just ordered one. This is a better deal per GB.
SanDisk 512GB Extreme UHS-I microSDXC Memory SDSQXA1-512G-AN6MA
I also ordered the microSD reader to go with it and get the full 170MB/s read speed with this card, as it uses proprietary Sandisk technology to achieve it.
SanDisk MobileMate USB 3.0 Card Reader SDDR-B531-AN6NN B&H Photo
Amazon also had the 512GB full-size SD Extreme Pro for the crazy price of $127.99 . No more at this price, but mine just shipped.
Also had to order the full size Sandisk SD reader for $17.99 . There sure will be a lot of SD slots in my desktop.
170MB/s read speed is 20MB/s more than what I get with my 4 year old Lexar 128GB UHS-II card currently. There is only a single 512GB UHS-II card on the market that achieves close to that read speed.
It's an Angelbird AV Pro for $399.
Angelbird 512GB AV Pro UHS-II SDXC Memory Card AVP512SDV60 B&H
To be fair that card does have a V60 rating for write speed whereas these much cheaper Sandisk are V30.
I mostly care about the read speed in my case, to transfer 4K videos to computer. So those very fast Sandisk cards with UHS-I proprietary reader are a steal.
I got denied for a B&H credit card that pays the sales tax. Not sure why, maybe because I'm currently vacationing in Vietnam. Will find out next week. Guess I'm not buying a GH5 because of the denial. And thus no need for V60 card. Saving tons of money this Black friday lol.