Wix is a huge platform with loads of templates, so if you want clone of wix or all the features, which wix is offering, then US $3,000 budget is very unrealistic, as in this budget, even basic features cannot be developed, because this is very low budget.
No doubt, there are many bids within your budget range, as every bidder want to get this project, because on Freelancer website, whatever budget you will select to post the project, most of the bids will be within that budget range, no matter what actual working hours or cost needed to develop.
Please ignore the bid amount, as our estimate is high & I would like to discuss.
Look forward to hearing from you.
Regards,
YK
LEADconcept