Are you in America, or elsewhere? I'm unable to find any American priced iMacs that are not customized and cost around $3K USD.
2020 Retina 27": $2,299 (3.8GHZ)
2019 Retina 27": $2,299 (3.7 GHZ)
2019 Retina 21": $1,499 (3.0 GHZ)
2017 iMac Pro: $4,999 (3.2 GHZ) [Note: This can not be your model, since it's greater then 3K USD and designed for pros.
2015 Retina 27": $2,299 (3.3 GHZ)
2014 Retina 27": $2,499 [speed unknown]
2013 Retina 27": $1,999 (3.4 GHZ)
2012 27": $1,999 (3.2 GHZ)
2011 27": $1,999 (3.1 GHZ)
2010 27": $1,999 (2.8 GHZ)
2009 27": $1,999 (2.66 GHZ)
(source: MacTracker)
COULD these prices be higher elsewhere in the world? Yes, because of import taxes and potentially VAT/Sales Tax. Could you be remembering the price with sales tax included if you're in America? Maybe (if you're paying 10% sales tax, the top of the line 2020 retina would be about $2,500).