Currently, '53 Izhevsk refurbs don't bring that much more than any other refurb, but over time, they will increase in value. You need to sit on it, and because it's a refurb, you can shoot it and enjoy it as much as you want. For me, personally, it's not about monetary value... that doesn't mean sh*t... I have spent 20x to 30x more on rifles and in some cases, ended up with real lemons. Case in point: I recently purchased a Kel-Tec sub2000 for $1100 + shipping (The PO put every bell and whistle on it)... turns out the lands were gouged to sh*t, the safety engaged every 2nd to 4th shot (not good), the reflex sight batteries were dead and difficult to find, and it still experienced frequent FTEs after 600 rounds (so much for break-in!)... it's currently on route to BC for repair work!... and because I'm the second owner, I'm out-of-pocket for the repairs! I have never had anything wrong with any SKS I've owned: unissued, as-issued, non-refurbished, refurbished, previously enjoyed, used, whatever. I have nothing but praise for a solid, proven design! They may be inexpensive, but they are among the few good deals still left in the shooting world. BTW, blued bayonets on an SKS look sweet. I once owned a 1952 Tula with a gorgeous deeply blued bayonet. I wish I had not sold it!
In terms of rarity, blued bayonets are EXTREMELY rare on a refurb!