I’ve found the cheapest option…
I fished an ancient specialized frame out of the back of the garage; 1″ headtube, 130mm spacing and slot dropouts that a previous owner clearly attacked with a file. It’s utterly worthless, I’ve just re-welded the canti bosses further up the stays to accommodate 700c wheels and found a pair of forks for £12.50 on fleabay.
So I’m building an “all the old standards” based SSCX bike in anticipation of having a crack at post lockdown CX racing…
But yeah, if you don’t want to pay over the odds go hunting for old school and mechanically simple stuff. None of this disc brakes and boost bollox, quill stems and rim brakes FTW 😉