mostly 3060tis and 3070s-3060tis are going for 35-40k and 3070s for around 45-48k.
there are many folks selling 3060s too,but their prices are not that great,usually in the same range as used 3060 tis-but recently i saw one for just 29k (a gigabyte model),which was quite well priced.
But i think its better to avoid such cards and buy new instead as no one knows for how long those cards were used and under what conditions-if they were used for mining then they are bound to go bad in the next few months.
And claiming warranty on them might be a problem,given that companies sometimes dont offer proper after sales support even for brand new products ,therefore one can very well imagine the nightmare that awaits someone who's unluckily caught dead with a malfunctioning second hand mining gpu.