Why price differs between OBDSTAR X100 PRO C and D type?

A customer was looking for purchasing the OBDSTAR made X100 Pro auto key programmer. But he was confused the price among C, D and C+D type? So he contacted the obd2diy.fr customer service and our sale girl soon left him the replay.
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OBDSTAR X100 PRO English version has 4 configurations

SK164 OBDSTAR X100 PRO C+D type:
IMMOBILISER+ OBD Software and Odometer Adjustment + OBD Software

SK164-B OBDSTAR X100 PRO C type:
IMMOBILISER+ OBD software

SK164-C OBDSTAR X100 PRO D type:
Odometer adjustment+ OBD software

Optional configuration (E): EEPROM adapter

(Note: IMMO function= program keys from vehicles’ immobilizer system)

Price differs because the function differs. Other features (hardware material, PCB, appearance, update, language etc) are the same.

SK164-C X100 Configuration D type (Odometer adjustment+ OBD software) does not come with 1pcs x HONDA-3 connector, 1pcs x HYUNDAI/KIA-10 connector and 1pcs x KIA-20 connector.

OBDSTAR X100 Pro key programmer vehicle coverage:

EEPROM Adapter: EEPROM ADAPTER V30.40

Immobilizer: ACURA, AUDI, BAIC, BESTURN, BRILLIANE, BYD, CHANGAN, CHANGHE, CHERY, CHRYSLER, CITROEN, DFLZ, DFPV, DS, FORD, GEELY, GM, GREATWALL, HAFEI, HAIMA, HAWTAI Motor, HONDA, HONGQI, HUAPU, HYUNDAI, INFINITI, JAC, JAGUAR, KIA, LANDROVER, LEXUS, LIFAN, LINCOLN, LUFENG, MAZDA, MG, MITSUBISHI, NISSAN, OPEL, PEUGEOT, PORSCHE, RENAULT, ROEWE, SAIC ENGLANG, SEAT, SKODA, SMART, SSANGYONG, SUBARU, SUZUKI, TOYOTA, VW, YOUNGLOTUS, ZZMAZDA, ZZNISSAN;

OBDII: OBDII V30.02 for diagnose

Odometer correction: AUDI, VW, BENZ, Chrysler, Ford, GM, Porsche, Skoda, Seat

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