I appreciate the fact you took the time to do a little research as most newbies don't even bother doing that. You should have also looked at what BTC to LTC was at the time of sale on those. However, you are using a charity auction hosted by Charlie Lee with proceeds going to the Litecoin Foundation in you 2019 example.... I also have something from that example:
I'm starting the auction at face value 40 LTC, which is about 0.3 BTC. Bids will be in BTC. All proceeds from this auction will be donated to the Litecoin Foundation
Today 40 LTC = roughly 0.17 BTC
Nearly double what it was at the time of that auction....
The other example BTC was $9500 and LTC was about $60.00.... today $13k BTC and $55 LTC..... do you see where you have an issue with your math?
Using examples like those with no context just comes off as being less than truthful.
Congrats on the house BTW and good luck with your sale, just be a bit more realistic.