The build itself looks decent. The components are of normal grade. Orange drops are not all they are cracked up to be if you ask me but are better than cheap China versions. The PS, HT caps don't look to be high-grade F&T quality but are not cheap IC brand either. There is a little bit of slop in the wiring, which is to say it could be cleaner, but it is still better than most original 5E3's that made it out of Fender's shop. There appears to be metal film resistors where it is best suited and the rest of the resistors are either carbon film or MF, but likely not carbon composition. Some prefer CC over CF or MF resistors, but MF is honestly the best all-around. MF is quieter, flameproof, more stable to temperature, and despite folklore, does not sound bad. The amp is loaded with JJ tubes, which I am OK with. I like JJ for the most part. I have had some tubes from them that are a little off but they have been more than reliable for me. Unless you go with NOS tubes, I say go with Genelex or JJ's. If you go with any other brand, well there is a 33% chance it was made by JJ anyway.
All in all, the amp appears to be made well enough and is built with above-average quality components. There is no reason it should sound bad, but not actually being able to hear it, who knows for certain. Being a kit amp made by hand, I would value that thing at around $400 - $500 used as it appears to be. If it were new, I would expect it to be around $600-$700 if there is no cabinet. If it were a full-on combo or came with a head cabinet, I can see it easily going between $1,200 to $1,500. It is likely to be better than anything Fender currently puts out in that model range.