It's interesting that the buyer of that JPS speedster on BaT, also has a $1.507mil bid on the BMW 507 currently up for auction on BaT. When asked about it through the reader's comments, his reply was: "two different purposes. 507 for vintage rallies, this [the JPS speedster] for thrashing daily."
The top of that JPS appears loose. When asked about it through the comment section, the seller advised it may be wise to purchase a new top......which I find a bit odd for a car recently completed.