Each time I check tld-list and domcomp for all the available rates,
but sometimes there are offers or coupons that are not available
on these websites and that's why I'm asking.
The TLD list shows the cheapest transfer for .club is NameSilo at $9.89, although Porkbun, Namecheap and Name are all within a dollar should you have other reasons for preferring one of them. When it gets to renew time NameSilo is also the cheapest, so it does appear a good option.
Remember you can check current registration, transfer and renew prices for ANY TLD and registrar at TLD-list (no association, but I use their service a lot :