Yes, I am aware most will laugh on this idea but hear me out!!! There is only one official and major Bitcoin testnet and it is the one I am talking about here. There are few other testnets but those have very limited adoption or are completely private or local to user. Testnet bitcoins are ment to be worthless so that they can be used to test various stuff on Bitcoin testnet. If the price is zero then there is no financial loss if one accidentaly loses some or all such bitcoins. That part I fully agree with, it makes sense. But there are another interesting facts:

1. Official testnet bitcoins are almost fully mined, current supply is 20.99 millions tBTC out of 21 millions maximum (see https://blockchair.com/bitcoin/testnet). New block rewards only a tiny amount of testnet bitcoins and that means current inflation is almost zero!

2. Even though Bitcoin testnet is designed to drop mining difficulty to just 1 if no new block is mined for more than 20 minutes such occurence rarely happens because there are many miners and very high hashrate at work to produce more blocks. Current difficulty is 112,335,652!!!

3. One of the ways to obtain some testnet bitcoins for free are faucets but they are running out of such bitcoins. Huge number of people / bots are requesting testnet bitcoins so faucet owners are forced to provide just a tiny amount of coins per request, like 0.0001 tBTC.

All that combined means that you will have hard time acquiring a big pile of testnet bitcoins for free. Need 100, 1k or 10k? 100k maybe? Good luck! So, if you find yourself in a situation that you want a huge bag of testnet bitcoins for whatever reason (collection of "worthless" altcoins, showing off, bragging rights maybe?), what options do realy you have? I seriously doubt that someone will send you 1k such bitcoins for free. Which brings us to my proposal here! I am willing to sell some of my 215,900 testnet bitcoins for let's say 1 USD each. I will consider other prices if you have a great argument. I can sign any random text to prove that I own that address. If you decide to buy, I will send coins first if you have legendary status on this forum or you are known person from cryptoscene else you pay first. I am accepting only Internet Computer (ICP) or Ethereum (ETH) and Ethereum tokens as payment because I have browser wallets for those cryptos only and don't care about other cryptos.

Coins are more than 9 years old, address is mhQYLvb7xSYFLDzeWp2bDPqo18neRthyc4 (see https://live.blockcypher.com/btc-testnet/address/mhQYLvb7xSYFLDzeWp2bDPqo18neRthyc4)

"Let's deal, my friend." - Gheed, Diablo 2