Hey Nid2007,
I don't have any experience with the GF-60... but if you aren't wedded to an ebony fretboard and bling of the G-45, and are looking for similar sound for less $$$, consider a D-30. The D-30 is a maple dread with arched maple back, spruce top with scalloped bracing, very much like the G-45 Hank Williams. But it has a rosewood fretboard and dot makers. They're usually relatively abundant on eBay and Reverb, and a nice one can be found for half (or less) the cost of a G-45.
Another one to look at would be the G-37 (predecessor of the D-30), made from ~1973-86. Again, maple body dread with arched back, spruce top with straight (unscalloped) braces, rosewood fretboard with dot markers. Early ones had one-piece mahogany necks and silk screened logo. Later, a multipiece maple neck and Chesterfield logo. Early G-37s can be had in VG condition for as little as $600, and later ones up to around $1K.
Don't know exactly what they were asking for the G-45... but there probably wasn't much of an "upcharge" for it being a signature model. It's pretty typical for limited edition Guilds of this trim level to sell in the $2-$3K range. There was a very similar limited edition model, the D-65S, with maple body, arched back, and the neck of a D-55 (ebony with abalone wedges in pearl block fret markers)...only ~20 made, and I think the last one I saw was in the $3K range.
Happy hunting!