Amazon UK has Playseat Challenge racing seat for your steering wheel and pedals for 155GBP which comes out to around $165 shipped to US when paying with a credit card without a foreign transaction fee. Make sure to process the transaction in GBP instead of letting Amazon do it ($172 in that case). Even if you have a credit card with a 3% foreign transaction fee, it might be a bit cheaper than using Amazon's own conversion.
There's a warning message that this doesn't ship to the US but Amazon does allow to check out with a US address (mine got shipped already). I feel the possible restriction is around the size that would make it not profitable for Amazon to ship. They do allow checkout despite the warning.