I have the 2013 EB5 and really enjoy it. Same pups and basically the same controls as my 2015 TBird, but honestly I think the EB sounds and plays better. Very versatile voicing on this beast and the low B is exceptionally nice. I still like most of my Thunderbirds a bit more, but when you need that Fender look and Gibson sound this is the bass. I think I paid about $500 for my used one several years ago. Because it's Thunderbird Thursday here's a pic of the EB along side my Anniversary Bird and a couple of SG Supremes...
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I think Gibson only made this model EB for a couple of years so not a ton of 5 strings out there. If you can find a 5 string in mint condition for around $800 give or take a hundred its a solid buy.