Is there a better DAC than the Schiit Bifrost for $300?


I have a Schiit Modi 2 Uber as my DAC. I'm not completely dissatisfied with it but understand that it is low end and that there must be room for improvement. I've got a nice older system but I'm not a fanatic about SQ (yet). I could use the Modi elsewhere or sell it...although Schiit just came out with the Modi 3 so the Modi 2 Uber is only worth about $60-$70 now.

There are open box Bifrosts on eBay for around $330. They are $400 new.

My questions are:

Should I see noticeable improvement going from the Modi 2 to the Bifrost?
What if I just went to a Modi 2 Multibit at $250 new, $200 used?
Is there another DAC I should consider in the $250-$300 range?
n80

pappan1 posts Pre Box S2 Digital - 32bit/768kHz PCM and DSD512 , FULL hardware MQA decoding, Dual mono high end ESS Sabre ESS9038 dual DAC
The best DAC money can buy not in that price but even double its price.
https://www.project-audio.com/en/product/pre-box-s2-digital/

If I’m not planning to use the MQA and DSD capabilities does the Pre Box S2  still make sense at the $400 price point or is there something that will beat it in sound quality in the $300-$500 range? I have a Modi 2 Multibit and think it sounds very good but may want to upgrade.
I’d follow mzkmxcv’s recommendation of the Topping D50. I ordered one based on only the measurements posted in the review on the following URL site:

https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-topping-d50-da...

I’m planning on using a decent 5V/1A battery power cell having a decent capacity (20,000 mAh). If one sets the digital volume to max (0.00 dBFS), then the IM distortion should be quite low at that setting, based on the measurements. I’m not planning on using it as a preamp, though one can do that. 
There is a Schiit Bifrost on eBay for $400. The description states that it was upgraded to the multibit card and that it comes with the documentation and the old card that was removed.

I am not going to buy it but it makes me wonder about buying upgraded components. How do you know the actual upgrade is in there? There are no pictures of the interior. It has the "multibit" decal on the back but the multibit serial number is marked out.

Again, not planing on buying but just wonder how you know? Maybe ask the seller for interior pictures?
n80: ask the seller for the unit serial number. Then contact the manufacturer about whether it was upgraded. If either one balks, then walk away. 
Good point. As mentioned, not in the market for this unit but may need to know how to go about this in the future. Thanks.