Merida vs Silverback

[nelis]

HI, Selling my first bike, upgrading slightly.

Upgrading to bigger bike, current frame too small for me.

Need advice, i am trading in my Alpine for a TFS500 both 08 models and i need to know how much i should pay in.

 

2008 Merida TFS 500 22''                     2008 Silverback Alpine L

Rock Shox Dart 2 L-out                        Suntour XCM SR L-out

Alexrims                                               Alexrims

Original 'Merida Race' nobblies            Innova slicks

X-mission Comp Handlebar, stem &    Silverback Concepts Handlebar, stem

seatpost                                              & seatpost + Extra- Long seatpost

Avid V-brakes                                       Silverback V-Brakes

Deore shifters,hubs,front derailer        Deore 2way shifters, rear and front

Deore XT Rear derailer                         derailers, hubs

Deore 9 speed                                     Sram 9 speed

Shimano Octalink crank + pedals         Suntour Crank + cleats

                                                      

Minor scratches on top of handle bar   No scratches, needs a service

 and a minor tear in TFS seat,

needs a service                                         

                                                             Included with Alpine is a        Serfas Mtb Helmet worn for 1 tour

Tempo Cycle Comp

 

Guy is asking R4800 but i can get same bike in size 20'' with disc brakes

for R4500.

 

How much are both worth after proper service? Or how much should i pay in?

 

HELP!

Thanks