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I see a large number of ATX boards with 1155 sockets, and 6 SATA ports, from MSI, Biostar and Asrock. My guess would be those don't qualify as "decent brands."
In which case, you can move to mATX and get boards by ASUS or Intel. Or spend 110-115 and get a full ATX from Gigabyte or ASUS.
As for exactly what you want ... that may not happen at all.
Perhaps if BD is price/performance competitive with the low end SB we might see a drop in low end socket 1155 platforms.
I feel I should be able to pay less than $100 for an ATX motherboard of a decent brand with 6 SATA ports
ASRock and MSI are not bad companies!
Biostar is though
LOL funny. My buddy just had to rma a msi h61 board and now is up and running perfectly on a biostar. I have used biostar on my last 5 builds without one single issue. Asus quality has slipped lately too according to many. I say they are all about the same these days, and it's luck of the draw. Many times the extra money some of these boards cost seems to me to go into fancy colored heatsinks and "gamer series" branding. Caveat emptor...