For the upped relic, I think a selling price increase would be good, considering that it is unusable, and it should be somewhere around the minimum selling price of upped cards, 1156.
You have only a few choices for upgraded card prices (
http://elementscommunity.org/forum/index.php/topic,18942.0.html) of Relic (costs 1 quantum), 901 (unupped nymphs), 1025 (upped relics), 1157 (upped non-rare),1297 (upped rare), 1601 (upped nymph). Because of the unique role of Relic, I think the current category(Tier 16 card) is good.