Even for the exact same card, the amount changes depending on the number of listings, timing, condition, and graded evaluation, so it is safe to view the displayed price as a single guideline
While I easily looked up the prices for my English foils on MTGPrice.com, attempting to pin a value on foreign cards required more digging, and the fact that Korean was the second rarest language made it felt like trudging through a wild west of card price

Visual Deck List Example deck List Pokmon - 18 4 Trapinch SSP 104 3 Flygon ex SSP 106 2 Mimikyu PAL 97 2 Pidgeot ex OBF 164 2 Pidgey OBF 162 1 Cornerstone Mask Ogerpon ex TWM 112 1 Fezandipiti ex SFA 38 1 Squawkabilly ex PAF 75 1 Tatsugiri TWM 131 1 Vibrava SSP 105 Trainer Cards - 33 4 Arven OBF 186 3 Iono PAF 80 1 Boss's Orders PAL 172 1 Crispin PRE 105 4 Buddy-Buddy Poffin PRE 101 4 Rare Candy PAF 89 3 Nest Ball PAF 84 2 Earthen Vessel PRE 106 2 Night Stretcher SFA 61 2 Ultra Ball PAF 91 1 Counter Catcher PAR 160 1 Super Rod PAL 188 1 Tera Orb SSP 189 2 Rescue Board PRE 126 1 Sparkling Crystal PRE 129 1 Technical Machine: Devolution PAR 177 Energy - 9 5 Basic Fighting Energy SVE 6 2 Basic Metal Energy SVE 8 2 Basic Water Energy SVE 3 Mamoswine ex BASIC STRATEGY Coming soon
In this next win I played See the difference
My biggest complaint with Guilds of Ravnica was the lack of options (and accordingly, replayability), and more alternative strategies is a great potential step towards fixing that in Ravnica Allegiance