I like Cabernet blends, Pinot noir, shiraz - up to $20-$30 a bottle.
Cabernet blends I don't follow.
Pinot Noir on Grays is very variable, there have been some Pinots in your price range, but few and far between. I have bought a few Buy Now Pinots on Grays, but in the $50+ range, they sometimes have some deals cheaper than elsewhere (Dalrymple Single Vineyards, Rockburn top level labels) not much currently.
Shiraz I mostly buy at the $7-$15 range for quaffer packs for my friends. There is a steady supply of reasonable Shiraz at that level if you know what to look for.
One I've bought a bit of is
Shiraz / Syrah 2022 Auction (0083-10734013) | Grays Australia often starting at $39/6++, sometimes less. This wine actually won the 2024 NWS Shiraz trophy
SHIRAZ TROPHY Won by: De Bortoli 2022 Heathcote Handcrafted Shiraz
But, like many show winners, it's actually not up to that standard IMO, you may be more impressed.
The De Bortoli Rutherglen Origins Shiraz Durif 2019 was a favourite, unfortunately finished now.
Out of your price range, but the stunning
Buy Langmeil Shiraz / Syrah 2021 | Grays Australia is probably the best price around on Grays.
This
Buy Shiraz / Syrah 2021 | Grays Australia is Heirloom White Label Barossa Shiraz.
Other VIP offers here:
Grays.com VIP Wine Club - Heavy Red Wine