Sellers can accept, counter, decline, or ignore an offer. You can't assume yours is the only offer and some sellers wait to the last moment to see if a better offer comes in before the offer expires. In that case, there is no time to decline the offer. Lowball offers are often ignored.
When you make offers, you take your chances. If you don't want to take your chances, you can use the Buy It Now option and pay the listed price.
Inceptions
Volunteer Community Mentor, buying and selling on eBay since 2004
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