Sending out Offers in marketplace.

Not sure what’s the appropriate section of the forum for this question but if I sent out an offer, am I committed to buy if the offer is accepted?

I’m fully committed to buy when I sent out the offer. However, the waiting period is 48hrs before it expires. I don’t know if the seller is ignoring the offer because it’s not what he wants or if he’s waiting to see if there’s a better offer. During this time, I see the same product being listed and want to send out the offer but not sure if I’m still reliable for the previous offer.