Dark Magneton

This Japanese Dark Magneton has no recent UK sales data to work from — your only steer is Cardmarket, where it's priced at £15.71. With no graded comps or active listings here in the last month, you're essentially buying on faith in the continental market's valuation. That said, the lack of UK movement could just mean it's rare enough that copies don't shift often rather than that demand is weak.

• NotableNo UK listings or graded sales in the last 30 days. Cardmarket is the only reference.