Firstly, I do doubt some of the price they’re quoting, because they are a non-Catholic church (“United Ecumenical Catholic Church,” probably one of the independent churches that broke from Rome some time ago), and it appears some of their other writings have anti-Catholic leanings. Secondly, as someone who owns some things from EuroClero and Gammarelli’s, I can state that the slide show exaggerated prices with some things I know the price of.
Next, I’d still like to say that I highly doubt that Raymond Cardinal Burke owns half the things you see in the picture. Most of the photos are most likely from ordinations for traditionalist societies in communion with Rome (probably FSSP or ICKSP), and these societies probably have the vestment sets. If not, Cardinal Burke is probably borrowing them from an archives collection, or the Vatican. This is not at all uncommon.
Out of everything in those pictures, His Eminence probably only owns his cassock, zucchetto, ring, socks, fascia, amice, and alb. There’s a chance it may be his mitre, if he has an odd head size.
Most bishops, as I said, do not have full sets of vestments. They use the diocese’s set, or a set belonging to the parish they visit, and bring a mitre.
Aside from that, one personal complaint I have is that so many journalist and personalities pain Cardinal Burke to be selfish, mean, and the epitome of clericalism. He’s really not. He’s a very patient, kind man, who would surprise you with his pastorality.