I buy bales of hay and then also mini bales from BB so that my rabbits get a variety as a horse bales lasts for MONTHS.
The hay you listed sounds good for bunnies- just make sure it is horse quality hay. Horse hay is usually considered to be a higher quality than hay for cows. IF you have a place to store it- it is worth a try. And if you buy it and your bunnies are not crazy about it- you can always give it to someone that has horses or a local shelter that might welcome it for their small animals. The most you have to lose if you do get a bale of high quality horse hay that is mostly grass- and you bunnies do not like it- is what $4????
From what I read from the add- it all seems to be grass hay- until you get to the clover which is a little richer than grass I believe- but it is a very small amount of clover.
The worst thing about buying a bale of hay- no matter how careful I am I ALWAYS get hay on the carpet in the trunk of my car.
And I have to vacuum my car before I can put anything else in the trunk like groceries since the hay will stick to the grocery bags.
I did get one bale of hay that I was not crazy about- I just gave it away and bought another from a different source. The hardest part about buying bale hay is finding someone that is willing to meet up with you to sell you just ONE bale of hay. I usually offer a couple of extra bucks to keep my supplier happy- and it is still cheaper than buying petstore hay.