Toy collector it depends on the model and year.
The XL was first introduced in 1957 with an overhead valve V-twin of 54CI (883 CC)
The XLCH (Competition High compression) a year later had the tuned engine small headlamp, small tank, lower bars, and loud (free flowing ) pipes.
One of the most sought after models of the XL is the XLCR (C-Competition R- Race)introduced in 1977. Its the cafe sportster that pops up here once and a while when a newbie discovers that woah! harley built a cafe!
It consisted of a 1000 CC sportster engine in a XR750 derived frame.
Also popular is the XR1000 sportster introduced in 1983.
(yeah I know way too much about them huh?)